EP0924888A3 - Verfahren und Vorrichtung zum Kanalausgleich in Wellenlängen-Multiplex-Systemen - Google Patents

Verfahren und Vorrichtung zum Kanalausgleich in Wellenlängen-Multiplex-Systemen Download PDF

Info

Publication number
EP0924888A3
EP0924888A3 EP98309790A EP98309790A EP0924888A3 EP 0924888 A3 EP0924888 A3 EP 0924888A3 EP 98309790 A EP98309790 A EP 98309790A EP 98309790 A EP98309790 A EP 98309790A EP 0924888 A3 EP0924888 A3 EP 0924888A3
Authority
EP
European Patent Office
Prior art keywords
channels
optical power
transmission path
channel
transmitters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98309790A
Other languages
English (en)
French (fr)
Other versions
EP0924888A2 (de
Inventor
Farideh Khaleghi
Alan Glen Solheim
Chris Wilhelm Barnard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Nortel Networks Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nortel Networks Ltd filed Critical Nortel Networks Ltd
Publication of EP0924888A2 publication Critical patent/EP0924888A2/de
Publication of EP0924888A3 publication Critical patent/EP0924888A3/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
EP98309790A 1997-12-19 1998-11-30 Verfahren und Vorrichtung zum Kanalausgleich in Wellenlängen-Multiplex-Systemen Withdrawn EP0924888A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US994761 1997-12-19
US08/994,761 US6040933A (en) 1997-12-19 1997-12-19 Method and apparatus for channel equalization in wavelength division multiplexed systems

Publications (2)

Publication Number Publication Date
EP0924888A2 EP0924888A2 (de) 1999-06-23
EP0924888A3 true EP0924888A3 (de) 2003-07-16

Family

ID=25541019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98309790A Withdrawn EP0924888A3 (de) 1997-12-19 1998-11-30 Verfahren und Vorrichtung zum Kanalausgleich in Wellenlängen-Multiplex-Systemen

Country Status (3)

Country Link
US (1) US6040933A (de)
EP (1) EP0924888A3 (de)
CA (1) CA2254593A1 (de)

Families Citing this family (88)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6031647A (en) * 1996-10-23 2000-02-29 Nortel Networks Corporation Stable power control for optical transmission systems
US6914717B1 (en) 1996-12-23 2005-07-05 Xtera Communications, Inc. Multiple wavelength pumping of raman amplifier stages
US6052393A (en) * 1996-12-23 2000-04-18 The Regents Of The University Of Michigan Broadband Sagnac Raman amplifiers and cascade lasers
US6115157A (en) * 1997-12-24 2000-09-05 Nortel Networks Corporation Methods for equalizing WDM systems
US6597493B2 (en) 2000-05-05 2003-07-22 The Regents Of The University Of Michigan Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers
US6665496B1 (en) 1998-04-27 2003-12-16 Ciena Corporation WDM ring transmission system
US6574037B2 (en) 1998-06-16 2003-06-03 Xtera Communications, Inc. All band amplifier
US6545799B1 (en) 1998-09-02 2003-04-08 Corning Incorporated Method and apparatus for optical system link control
US6317231B1 (en) * 1998-09-04 2001-11-13 Lucent Technologies Inc. Optical monitoring apparatus and method for network provisioning and maintenance
SE513096C2 (sv) 1998-10-02 2000-07-10 Ericsson Telefon Ab L M Förfarande och anordning för kanalutjämning av våglängdsmultiplexerade optiska system
US20050002671A1 (en) * 1998-11-17 2005-01-06 Corvis Corporation Wavelength division multiplexed optical transmission systems, apparatuses, and methods
US6452707B1 (en) * 1999-02-17 2002-09-17 Tycom (Us) Inc. Method and apparatus for improving spectral efficiency in fiber-optic communication systems
US7013088B1 (en) 1999-05-26 2006-03-14 Jds Uniphase Corporation Method and apparatus for parallel optical interconnection of fiber optic transmitters, receivers and transceivers
US6236481B1 (en) * 1999-06-09 2001-05-22 Astarte Fiber Networks, Inc. Method and apparatus for providing loss equalization and adjustment in a fiber optic network
US6433904B1 (en) 1999-07-27 2002-08-13 Sycamore Networks, Inc. Method and apparatus for improving transmission performance over wavelength division multiplexed optical communication links using forward error correction coding
FR2800219B1 (fr) * 1999-10-22 2006-06-30 Algety Telecom Procede d'ajustement de puissance pour un systeme de transmission optique a multiplexage en longueur d'onde
KR20010073485A (ko) * 2000-01-15 2001-08-01 박남규 채널 파워의 불규칙 진동이 저감된 파장분할다중 링네트워크
US6421167B1 (en) 2000-03-03 2002-07-16 General Dynamics Advanced Technology Systems, Inc. Multiple function bandwidth management systems
AU2001245441A1 (en) * 2000-03-06 2001-09-17 Lightchip, Inc. Optical power managed network node for processing dense wavelength division multiplexed optical signals
US6449068B1 (en) * 2000-03-06 2002-09-10 Lightchip, Inc. Optical power managed network node for processing dense wavelength division multiplexed optical signals
WO2001080462A2 (en) * 2000-04-13 2001-10-25 Sycamore Networks, Inc. System and method for adjusting transmission power of respective light beams in a wavelength-division multiplexed network
WO2001082516A1 (en) * 2000-04-24 2001-11-01 Lucent Technologies Inc. Gain equalization in dwdm networks
DE10024393A1 (de) * 2000-05-17 2001-11-29 Siemens Ag Verfahren zur Regelung des Signal-Rausch-Abstandes von optischen Add/Drop-Signalen
KR100341825B1 (ko) * 2000-06-05 2002-06-26 윤덕용 편광소멸법을 이용한 광신호 대 잡음비 감시방법 및 장치
US6701089B1 (en) * 2000-06-30 2004-03-02 Nortel Networks Limited Over-equalization for multi-span wavelength division multiplexed fiber optic communication systems
US6456409B2 (en) 2000-07-21 2002-09-24 Sycamore Networks, Inc. Method and apparatus for extending fiber transmission distance with multiple pre-emphases in optically amplified DWDM system
JP4671478B2 (ja) * 2000-08-08 2011-04-20 富士通株式会社 波長多重光通信システムおよび波長多重光通信方法
US6452715B1 (en) 2000-08-29 2002-09-17 Ciena Corporation Method and apparatus for determining a fiber plant gain transfer function and utilizing same to control distributed gain
US6961524B1 (en) * 2000-09-22 2005-11-01 Nortel Networks Limited WDM channel equalization in add/drop-capable optical networks
US6859622B1 (en) 2000-12-26 2005-02-22 Nortel Networks Limited Predictive optimization of wavelength division multiplexed systems
IL141740A (en) * 2001-03-01 2005-12-18 Eci Telecom Ltd Method and system for handling optical signals
US6532101B2 (en) 2001-03-16 2003-03-11 Xtera Communications, Inc. System and method for wide band Raman amplification
US6810214B2 (en) 2001-03-16 2004-10-26 Xtera Communications, Inc. Method and system for reducing degradation of optical signal to noise ratio
US20020163683A1 (en) * 2001-03-26 2002-11-07 Antoniades Neophytos A. Performance optimizer for transmission systems
GB0107929D0 (en) * 2001-03-29 2001-05-23 Marconi Comm Ltd A wavelength division multiplex power control system
US6871020B1 (en) * 2001-04-03 2005-03-22 At&T Corp. Power spectrum monitoring and management in a wavelength division multiplexed network
US6559985B1 (en) * 2001-05-09 2003-05-06 Ciena Corporation Method and system for determining channel power in an optical communications network
US7242863B2 (en) * 2001-05-09 2007-07-10 Ciena Corporation Method and system for coordinating and utilizing channel power information in an optical communications network
US6614589B2 (en) * 2001-05-09 2003-09-02 Ciena Corporation Method and system for controlling amplifier power in an optical communications network
US6600596B2 (en) * 2001-05-09 2003-07-29 Ciena Corporation Method and system for controlling amplifier power in an optical communications network having add/drop capability
US6636666B2 (en) 2001-05-14 2003-10-21 University Of Iowa Research Foundation Optical power equalizer
US20030058494A1 (en) * 2001-06-27 2003-03-27 Roberts Kim B. Control of parameters in a global optical controller
US6587259B2 (en) 2001-07-27 2003-07-01 Xtera Communications, Inc. System and method for controlling noise figure
US6614586B2 (en) * 2001-07-30 2003-09-02 Dorsal Networks, Inc. Methods and systems for high performance, wide bandwidth optical communication systems using Raman amplification
CN1324829C (zh) * 2001-08-03 2007-07-04 华为技术有限公司 密集波分复用系统的功率均衡的实现方法
US20030053750A1 (en) * 2001-09-20 2003-03-20 Yang William (Wei) Dynamic channel power equalizer based on VPG elements
US6594071B1 (en) 2001-10-02 2003-07-15 Xtera Communications, Inc. Method and apparatus for amplifier control
US6819479B1 (en) 2001-12-20 2004-11-16 Xtera Communications, Inc. Optical amplification using launched signal powers selected as a function of a noise figure
US7233432B2 (en) * 2001-12-20 2007-06-19 Xtera Communications, Inc. Pre-emphasized optical communication
US20040208516A1 (en) * 2002-01-07 2004-10-21 Thomas Clark Systems and methods for launch power pre-emphasis
US6819478B1 (en) 2002-03-15 2004-11-16 Xtera Communications, Inc. Fiber optic transmission system with low cost transmitter compensation
US6825973B1 (en) 2002-03-15 2004-11-30 Xtera Communications, Inc. Reducing leading edge transients using co-propagating pumps
US6778321B1 (en) 2002-03-15 2004-08-17 Xtera Communications, Inc. Fiber optic transmission system for a metropolitan area network
US7197245B1 (en) 2002-03-15 2007-03-27 Xtera Communications, Inc. System and method for managing system margin
KR100458678B1 (ko) * 2002-03-20 2004-12-03 주식회사 럭스퍼트 이득제공 방식의 광파워 평탄화기
US7076163B2 (en) * 2002-03-27 2006-07-11 Fujitsu Limited Method and system for testing during operation of an open ring optical network
US7231148B2 (en) * 2002-03-28 2007-06-12 Fujitsu Limited Flexible open ring optical network and method
US7116905B2 (en) 2002-03-27 2006-10-03 Fujitsu Limited Method and system for control signaling in an open ring optical network
US6959149B2 (en) * 2002-03-29 2005-10-25 Nortel Networks Limited Power balancing in DWDM optical networks
US6842562B2 (en) * 2002-05-30 2005-01-11 Fujitsu Network Communications, Inc. Optical add/drop node and method
GB0213385D0 (en) * 2002-06-11 2002-07-24 Marconi Comm Ltd Maximising power in optical communications networks
IL150347A (en) * 2002-06-20 2008-07-08 Eci Telecom Ltd Method and system for span optical power control
US20040208577A1 (en) * 2002-07-23 2004-10-21 Sycamore Networks, Inc. Methods for in-service wavelength upgrade and system performance optimization in WDM optical networks
CN1720680A (zh) * 2002-12-16 2006-01-11 特瑞林克通讯有限公司 利用可调光带通滤波器和偏振致零方法的光信噪比监测方法和设备
US7139480B2 (en) * 2003-06-30 2006-11-21 Tropic Networks Inc. System and method for power management in an optical network
ATE322776T1 (de) * 2003-12-04 2006-04-15 Cit Alcatel Übertragungssteuerung und -verfahren zum kanalausgleich in einem wellenlängen-multiplex- system
WO2005078969A1 (ja) * 2004-02-16 2005-08-25 Nippon Telegraph And Telephone Corporation ビットレート自動制御回路
US7450851B2 (en) * 2004-08-27 2008-11-11 Fujitsu Limited System and method for modularly scalable architecture for optical networks
DE102004047693B4 (de) * 2004-09-30 2024-11-14 Xieon Networks S.À.R.L. Verfahren zur Preemphase eines optischen Wellenlängen-Multiplexsignals
JP4702540B2 (ja) * 2005-11-24 2011-06-15 日本電気株式会社 光伝送装置及びシステム並びにその制御方法及びプログラム
US8045852B2 (en) * 2008-04-23 2011-10-25 Alcatel Lucent Channel balancing algorithm
US8055129B2 (en) * 2008-05-07 2011-11-08 Alcatel Lucent Alien wavelength channel balancing and line amplifier optimization
US8406637B2 (en) 2008-05-27 2013-03-26 Xtera Communications, Inc. Automatic pre-emphasis
US9485050B2 (en) 2009-12-08 2016-11-01 Treq Labs, Inc. Subchannel photonic routing, switching and protection with simplified upgrades of WDM optical networks
JP5633266B2 (ja) * 2010-09-15 2014-12-03 富士通株式会社 Ｗｄｍ光伝送システムおよびその制御方法
US9170744B1 (en) 2011-04-06 2015-10-27 P4tents1, LLC Computer program product for controlling a flash/DRAM/embedded DRAM-equipped system
US9158546B1 (en) 2011-04-06 2015-10-13 P4tents1, LLC Computer program product for fetching from a first physical memory between an execution of a plurality of threads associated with a second physical memory
US9164679B2 (en) 2011-04-06 2015-10-20 Patents1, Llc System, method and computer program product for multi-thread operation involving first memory of a first memory class and second memory of a second memory class
US9176671B1 (en) 2011-04-06 2015-11-03 P4tents1, LLC Fetching data between thread execution in a flash/DRAM/embedded DRAM-equipped system
US8930647B1 (en) 2011-04-06 2015-01-06 P4tents1, LLC Multiple class memory systems
US9417754B2 (en) 2011-08-05 2016-08-16 P4tents1, LLC User interface system, method, and computer program product
WO2014201607A1 (zh) * 2013-06-17 2014-12-24 华为技术有限公司 光信号传输方法、装置及光发射机
US9083458B2 (en) * 2013-07-09 2015-07-14 Cisco Technology, Inc. Self-tuning an optical network at an operating point
WO2015045311A1 (ja) * 2013-09-24 2015-04-02 日本電気株式会社 伝送装置、伝送システム、伝送方法及びプログラムが記憶された記憶媒体
JP2018007058A (ja) * 2016-07-04 2018-01-11 富士通株式会社 ネットワーク制御装置、光伝送システムおよび障害判定方法
US10187149B2 (en) * 2017-05-05 2019-01-22 Cisco Technology, Inc. Downstream node setup
US10630416B2 (en) * 2018-04-11 2020-04-21 Huawei Technologies Co., Ltd. System and method for optical channel reconfiguration
EP4170934A1 (de) * 2021-10-22 2023-04-26 ADVA Optical Networking SE Verfahren zur reduzierung der auswirkung von transienten effekten in einem optischen netzwerk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734129A2 (de) * 1995-03-20 1996-09-25 Fujitsu Limited Optische Verstärkungsvorrichtung für mehrere Wellenlängen
JPH09261205A (ja) * 1996-03-18 1997-10-03 Fujitsu Ltd 波長分割多重が適用されるシステム及び光パワー制御装置
US5689594A (en) * 1995-12-29 1997-11-18 Mci Communications Corp. Multiple wavelength bidirectional lightwave amplifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5225922A (en) * 1991-11-21 1993-07-06 At&T Bell Laboratories Optical transmission system equalizer
US5745275A (en) * 1996-10-15 1998-04-28 Lucent Technologies Inc. Multi-channel stabilization of a multi-channel transmitter through correlation feedback

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734129A2 (de) * 1995-03-20 1996-09-25 Fujitsu Limited Optische Verstärkungsvorrichtung für mehrere Wellenlängen
US5689594A (en) * 1995-12-29 1997-11-18 Mci Communications Corp. Multiple wavelength bidirectional lightwave amplifier
JPH09261205A (ja) * 1996-03-18 1997-10-03 Fujitsu Ltd 波長分割多重が適用されるシステム及び光パワー制御装置
US6134034A (en) * 1996-03-18 2000-10-17 Fujitsu Limited Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
TOBA H ET AL: "DEMONSTRATION OF OPTICAL FDM BASED SELF-HEALING RING NETWORK EMPLOYING ARRAYED-WAVEGUIDE-GRATING ADM FILTERS AND EDFAS", PROCEEDINGS OF THE EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) FIRENZE, SEPT. 25 - 29, 1994, GENOVA, IIC, IT, vol. 1 CONF. 20, 25 September 1994 (1994-09-25), pages 263 - 266, XP000671739 *
TONGUZ O K ET AL: "GAIN EQUALIZATION OF EDFA CASCADES", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE. NEW YORK, US, vol. 15, no. 10, 1 October 1997 (1997-10-01), pages 1832 - 1841, XP000703598, ISSN: 0733-8724 *
WILLNER A E ET AL: "Dynamic channel equalization in reconfigurable WDM networks using acousto-optic tunable filters", LASERS AND ELECTRO-OPTICS SOCIETY ANNUAL MEETING, 1996. LEOS 96., IEEE BOSTON, MA, USA 18-19 NOV. 1996, NEW YORK, NY, USA,IEEE, US, 18 November 1996 (1996-11-18), pages 180 - 181, XP010204901, ISBN: 0-7803-3160-5 *

Also Published As

Publication number Publication date
US6040933A (en) 2000-03-21
CA2254593A1 (en) 1999-06-19
EP0924888A2 (de) 1999-06-23

Similar Documents

Publication Publication Date Title
US6040933A (en) Method and apparatus for channel equalization in wavelength division multiplexed systems
CA2198503C (en) Dispersion-tolerant 10 gb/s optical transceiver
US6043914A (en) Dense WDM in the 1310 nm band
WO2002089380A3 (en) Network transceiver for extending the bandwidth of optical fiber-based network infrastructure
US7400830B2 (en) Quality monitoring method and apparatus for wavelength division multiplexed optical signal and optical transmission system using the same
JP4833818B2 (ja) 光信号における光学分散を補償する方法及びシステム
SE9803348L (sv) Förfarande och anordning för kanalutjämning av våglängdsmultiplexerade optiska system
WO2002009299A3 (en) Method and apparatus for extending fiber transmission distance with multiple pre-emphases in optically amplified dwdm system
DE60304486D1 (de) Übertragungssteuerung und -Verfahren zum Kanalausgleich in einem Wellenlängen-Multiplex-System
JPWO2010050124A1 (ja) 光受信機
US7376353B2 (en) Method and apparatus for dispersion management in optical mesh networks
CA2243096A1 (en) System of controlling wavelength division multiplexed optical amplifier and method thereof
CA2472322A1 (en) Noise reduction in optical communications networks
JP3771830B2 (ja) 自動分散補償回路付き光波長多重伝送システム
CA2458038C (en) A compact hybrid integrated optical dynamic channel equalizer
JP3769172B2 (ja) 光波長多重伝送システム
JP2007510388A (ja) 海底光伝送システムのためのケーブル・ステーション
RU2273957C2 (ru) Способ выравнивания мощности в системе плотного уплотнения каналов связи с разделением по длине волны
JP3111964B2 (ja) 光利得等化装置及び方法
WO1999043118A1 (en) Dense wdm in the 1310nm band
US6775429B2 (en) Dynamic gain equalization system design with adaptive spectrum decomposition methodology
JP3527417B2 (ja) 光波長分岐挿入装置
US20020097464A1 (en) Method for adjusting time delays and device for synchronization of channels in a WDM system
JPH09116493A (ja) 波長多重伝送システム
JP2003115822A (ja) 波長多重光伝送システム

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NORTEL NETWORKS CORPORATION

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BARNARD, CHRIS WILHELM

Inventor name: SOLHEIM, ALAN GLEN

Inventor name: KHALEGHI, FARIDEH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NORTEL NETWORKS LIMITED

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NORTEL NETWORKS LIMITED

17P Request for examination filed

Effective date: 20031218

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20040525

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20051230

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BARNARD, CHRIS WILHELM

Inventor name: SOLHEIM, ALAN GLEN

Inventor name: KHALEGHI, FARIDEH